package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;

    /**
     * 将套餐或者菜品添加到购物车
     * @param shoppingCart
     * @return
     */
    @RequestMapping("/add")
    public R<ShoppingCart> save(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据为：{}",shoppingCart);
        //设置用户id，指定当前是那个用户的而购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        Long dishId = shoppingCart.getDishId();

        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);

        if (dishId!=null){
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId,dishId);

        }else {
            //添加到购物车的是套餐
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());

        }
        //查询当前菜品或者套餐是否在购物车当中
        //sql：select * from shopping_cart where user_id=? and dish_id=? /setmeal_id=?
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
        if (cartServiceOne!=null){
            //如果存在，则子啊原来的基础上加一
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            cartServiceOne.setCreateTime(LocalDateTime.now());
            shoppingCartService.updateById(cartServiceOne);
        }else{
            //如果不存在，则添加到购物车，数量默认是一
            shoppingCart.setNumber(1);
            shoppingCartService.save(shoppingCart);
            cartServiceOne=shoppingCart;
        }
        return R.success(cartServiceOne);
    }

    /**
     * 查看购物车
     * @return
     */
    @RequestMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车。。。");
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        return R.success(list);
    }

    /**
     *  清空购物车
     */
    @DeleteMapping("/clean")
    public R<String> clean(){
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        shoppingCartService.remove(queryWrapper);
        return R.success("清空购物车成功");
    }
}
